METHOD AND APPARATUS FOR DEFLECTING A SPRAY OF WASH LIQUID TO A DESIRED LOCATION IN A CLEANING APPLIANCE
A method and apparatus for deflecting a spray of wash liquid to a desired location in either a drum or tub of a cleaning appliance along different flow paths and/or flow patterns according to the velocity of the wash liquid.
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Cleaning appliances, an example of which is a clothes washing machine or clothes washer, are used for treating, such as cleaning or refreshing, clothing and other fabric items. Cleaning appliances may have a perforated drum located within an imperforate tub, with the drum being rotatable relative to the tub about a rotational axis that may vary from horizontal to vertical. The fabric load is placed in the drum where a treating chemistry, such as wash liquid, is free to flow between the drum and the tub through the perforations. A dispensing system, such as a wash liquid system, delivers the treating chemistry to one or both of the drum and the tub.
Some dispensing systems for clothes washers, especially those with a generally vertical rotational axis, include a wash liquid dispenser positioned in the tub ring overlying the upper edges of the drum and tub. Such systems suffer in that they dispense from only one point, resulting in the wetting of only the portion of the fabric load beneath the dispensing point.
Some dispensing systems have multiple dispensing locations to more widely wet the fabric load. These dispensing systems suffer in that to function properly they require a relatively high incoming water pressure to supply wash liquid to each dispensing location. When water pressure is relatively low, spray velocity and spray angle of wash liquid at each dispensing location is decreased or reduced and wash liquid may not be sufficiently supplied to each dispensing location to properly wet the fabric load, which may negatively impact cleaning performance.
SUMMARY OF THE INVENTIONThe invention relates to a method and apparatus for deflecting a spray of wash liquid to a desired location in either a drum or tub of a cleaning appliance along different flow paths and/or flow patterns according to the velocity of the wash liquid.
In the drawings:
Referring now to the figures and particularly to
Further the term wash liquid as used herein is intended to be generic to any type of liquid used in a cleaning appliance. In the case of clothes washers, the wash liquid is historically water or water in combination with other chemistries, such as detergents, rinse agents, fabric softeners, bleach, etc.
The clothes washer 10 may include a cabinet 12 having a controller 14, and enclosing an open top perforated drum 16 that may define a wash chamber 18 sized to receive a fabric load of items to be washed. In the illustrated example, the drum 16 may rotate about a vertical axis. An imperforate tub 20 may be provided to house the drum 16 and holds wash liquid. An annular tub ring 22 may be mounted to the upper edge of the tub 20 within the cabinet 12 to overlie the upper edge of the drum 16 to form an opening 24 into the wash chamber 18. A clothes mover 72 may be mounted within the drum 16 and may rotate relative to the drum 16 and the tub 20. Rotation of the drum 16 and the clothes mover 72 imparts mechanical energy to the wash liquid and to the fabric load to move the fabric items within the wash chamber 18. The exemplary clothes mover 72 may be a conventional dual-action agitator assembly. A variety of other designs for the clothes mover 72 may also be used, including, but not limited to an agitator, with or without an auger, a low profile impeller, and peripheral vanes on the drum 16, or the clothes mover 72 may be omitted altogether without affecting the scope of the invention.
A drive mechanism 74, such as a reversible drive mechanism, may be used to rotate the drum 16 relative to the tub 20. Similarly, the clothes mover 72 may be coupled to the drive mechanism 74 such that the clothes mover 72 can rotate relative to the drum 16 and the tub 20.
A liquid supply system 26, only partially illustrated in
A top and bottom view of the deflector 30 is shown in
The side walls 36, 38 of the deflector 30 may be flared outwardly with respect to each other. At their outermost extends, the side walls 36, 38 are separated by a distance D that defines, together with the relative angles at which the side walls 36, 38 are disposed, a maximum spray angle A for wash liquid directed into the drum 16 or tub 20 by the deflector 30.
As illustrated in
The lower channel portion 60 includes at least one orifice 64 adjacent each deflector 30. More specifically, the orifice 64 may be in opposing relation with the first angled section 48 of the deflector 30. The orifice 64 restricts the flow of wash liquid out of the wash liquid channel 52 to create a pressurized stream of wash liquid that typically strikes the first angled section 48 and is directed toward the inner deflecting surface 44 of the deflector 30. The orifice 64 may be approximately 4 mm in diameter.
The deflector 30 may have a shape that provides at least two distinct flow paths for wash liquid in response to the velocity of wash liquid emitted from the orifice 64, which is ultimately dependent on the water pressure of the household in which the clothes washer 10 resides. That is, the orifice 64 is exposed to ambient pressure whereas the wash liquid is supplied to the orifice 64 generally at the pressure of the household water supply. The difference in the household water supply pressure and ambient pressure creates a pressure differential that forces the wash liquid out the orifice 64. The greater the pressure differential, the greater will be the dynamic pressure of the fluid, resulting in an increase in the exit velocity of the wash liquid. Because the variation in the ambient pressure is negligible compared to the variation in the household water supply, any increase/decrease in the household water supply pressure generates a corresponding increase/decrease in the velocity of the wash liquid leaving the orifice 64.
The contour of the deflecting surface 44 can be configured to be responsive to the velocity of wash liquid emitted from the orifice 64. As illustrated, one suitable shape for the deflector 30 that provides at least two distinct flow paths is the first and second angled sections 48, 46.
Two examples of velocity-responsive flow paths for wash liquid are illustrated in
A second flow path, shown in
The fountain-like pattern 70 is created by the wash liquid flowing around the tip 66 and upward along the outer surface 42 until it separates from the deflector 30 and is directed forwardly there from by its own momentum, forwardly being defined in a direction of the flow of wash liquid emitted from the orifice 64. Wash liquid thus cascades upwardly and outwardly from the tip 66 of the deflector 30. The radius of the deflector tip 66 and the contour of the deflecting surface 44 will determine the trajectory of the fountain-like pattern 70. The fountain-like pattern 70 may have different configurations which are dependent on the shape of the deflector 30 and the household water pressure, both of which affect the location at which the stream of wash liquid separates from the deflector 30. As illustrated, the fountain-like pattern 70 includes multiple discrete streams of wash liquid extending outward from the tip 66 in a curving trajectory. Alternately, the fountain-like pattern 70 may include one discrete stream of wash liquid and may have different trajectories of varying heights and lengths. For example, a larger tip radius will allow the stream of wash liquid to follow the tip surface and will result in a fountain-like pattern 70 having a higher and/or longer trajectory, while a smaller tip radius will not allow the stream of wash liquid to follow the tip surface and will result in a fountain-like pattern 70 having a lower and/or shorter trajectory. The particular shape or geometry of the deflector 30 may be anything that results in the Conada effect controlling one of the velocity-responsive flow paths to direct the water forward.
Referring to
In operation, wash liquid is supplied to the wash liquid dispenser 28 by the liquid supply system 26 (
While the invention has been specifically described in connection with certain specific embodiments thereof, it is to be understood that this is by way of illustration and not of limitation. Reasonable variation and modification are possible within the scope of the forgoing disclosure and drawings without departing from the spirit of the invention which is defined in the appended claims.
Claims
1. A cleaning appliance comprising:
- a wash chamber for holding items to be washed;
- a wash liquid dispenser for emitting wash liquid; and
- at least one deflector located to deflect the wash liquid emitted from the wash liquid dispenser into the wash chamber, and having a deflecting surface terminating in a rounded tip wherein wash liquid emitted at a first velocity flows along the deflecting surface and separates from the deflector at the rounded tip in a fan-like pattern, and wash liquid emitted at a second velocity, less than the first velocity, flows along the deflecting surface around the rounded tip wherein it separates from the deflector in a fountain-like pattern.
2. The cleaning appliance according to claim 1 and further comprising a tub for holding wash liquid and a drum located within the tub and defining the wash chamber.
3. The cleaning appliance according to claim 2 wherein the drum rotates about a vertical axis of rotation.
4. The cleaning appliance according to claim 2 and further comprising a tub ring carried by the tub and defining an opening into the drum and the deflector is provided on the tub ring.
5. The cleaning appliance according to claim 4 wherein the deflector is formed in the tub ring.
6. The cleaning appliance according to claim 4 wherein the wash liquid dispenser comprises a header with at least one orifice aligned with the at least one deflector.
7. The cleaning appliance according to claim 1 wherein the at least one deflector comprises multiple deflectors disposed around the wash chamber.
8. The cleaning appliance according to claim 1 wherein the rounded tip comprises a tear-drop shape.
9. The cleaning appliance according to claim 1 wherein the fan-like pattern comprises wash liquid moving downwardly from an inner surface of the tip.
10. The cleaning appliance according to claim 1 wherein the fountain-like pattern comprises wash liquid moving upwardly and outwardly from an outer surface of the tip.
11. A cleaning appliance comprising:
- a wash chamber for holding items to be washed;
- a wash liquid dispenser for emitting wash liquid; and
- at least one deflector located to deflect the wash liquid emitted from the wash liquid dispenser into the wash chamber, and having a shape to provide at least two distinct flow paths in response to the velocity of the emitted wash liquid, with a first flow path projecting downwardly from the deflector and a second flow path projecting forwardly from the deflector.
12. The cleaning appliance according to claim 11 and further comprising a tub for holding wash liquid and a drum located within the tub and defining the wash chamber.
13. The cleaning appliance according to claim 12 wherein the drum rotates about a vertical axis of rotation.
14. The cleaning appliance according to claim 12 and further comprising a tub ring carried by the tub and defining an opening into the drum and the deflector is carried by the tub ring.
15. The cleaning appliance according to claim 14 wherein the deflector is formed in the tub ring.
16. The cleaning appliance according to claim 14 wherein the wash liquid dispenser comprises a header with at least one orifice aligned with the at least one deflector.
17. The cleaning appliance according to claim 11 wherein the at least one deflector comprises multiple deflectors disposed around the wash chamber.
18. The cleaning appliance according to claim 11 wherein the shape comprises a deflecting surface having an outlet tip with a geometry that provides at least one of the at least two distinct flow paths.
19. The cleaning appliance according to claim 18 wherein the geometry of the tip comprises a radius on the tip.
20. The cleaning appliance according to claim 18 wherein the geometry of the tip comprises a tear-drop shape.
21. The cleaning appliance according to claim 11 wherein the first flow path generates a fan-like pattern.
22. The cleaning appliance according to claim 11 wherein the second flow path generates a fountain-like pattern.
23. A method for delivering wash liquid to a cleaning appliance having a drum located for holding items to be washed, and a deflector for deflecting wash liquid into one of the tub and drum, the method comprising:
- emitting wash liquid towards the deflector;
- deflecting wash liquid along a first flow path projecting downwardly from the deflector when wash liquid is emitted at a first velocity; and
- deflecting wash liquid along a second flow path projecting outwardly from the deflector when wash liquid is emitted at a second velocity which is less than the first velocity.
24. The method of claim 23 wherein the deflecting of wash liquid along the first flow path comprises generating a fan-like pattern with the deflected wash liquid.
25. The method of claim 24 wherein the deflecting of wash liquid along the second flow path comprises generating a fountain-like pattern with the deflected wash liquid.
26. The method of claim 25 wherein the fan-like pattern and the fountain-like pattern cover the same area in the drum.
27. The method of claim 23 wherein the emitting of wash liquid towards the deflector comprises emitting wash liquid from multiple locations, each of which is directed to a different deflector.
28. The method of claim 27 wherein the deflected wash liquid wets an area coextensive with a bottom of the drum.
29. A cleaning appliance comprising:
- a wash chamber for holding items to be washed;
- a wash liquid dispenser for emitting wash liquid; and
- at least one deflector located to deflect the wash liquid emitted from the wash liquid dispenser into the wash chamber, and having a shape wherein wash liquid emitted at a first velocity separates from the deflector at a first location and wash liquid emitted at a second velocity, less than the first velocity, separates from the deflector at a second location.
30. The cleaning appliance according to claim 29 and further comprising a tub for holding wash liquid and a drum located within the tub and defining the wash chamber.
31. The cleaning appliance according to claim 30 wherein the drum rotates about a vertical axis of rotation.
32. The cleaning appliance according to claim 30 and further comprising a tub ring carried by the tub and defining an opening into the drum and the deflector is carried by the tub ring.
33. The cleaning appliance according to claim 32 wherein the deflector is formed in the tub ring.
34. The cleaning appliance according to claim 32 wherein the wash liquid dispenser comprises a header with at least one orifice aligned with the at least one deflector.
35. The cleaning appliance according to claim 29 wherein the at least one deflector comprises multiple deflectors disposed around the wash chamber.
36. The cleaning appliance according to claim 29 wherein the shape comprises a curved deflecting surface having an outlet tip.
37. The cleaning appliance according to claim 36 wherein the tip comprises a radius on the tip.
38. The cleaning appliance according to claim 36 wherein the tip comprises a tear-drop shape.
39. The cleaning appliance according to claim 29 wherein the first location comprises an inner surface of the deflector.
40. The cleaning appliance according to claim 29 wherein the second location comprises an outer surface of the deflector.
41. A cleaning appliance comprising:
- a wash chamber for holding items to be washed;
- a wash liquid dispenser for emitting wash liquid; and
- at least one deflector located to deflect the wash liquid emitted from the wash liquid dispenser into the wash chamber, and having a deflecting surface terminating in a rounded tip.
42. The cleaning appliance according to claim 41 wherein the deflecting surface comprises a first angled section in opposing relation to the wash liquid dispenser and a second angled section which directs wash liquid downward toward the wash chamber.
43. The cleaning appliance according to claim 42 wherein the second angled section is oriented at a steeper angle than the first angled section.
44. The cleaning appliance according to claim 42 wherein the at least one deflector comprises multiple deflectors disposed around the wash chamber.
45. The cleaning appliance according to claim 42 wherein the rounded tip comprises a tear-drop shape.
Type: Application
Filed: Sep 12, 2008
Publication Date: Mar 18, 2010
Patent Grant number: 9010160
Applicant: WHIRLPOOL CORPORATION (BENTON HARBOR, MI)
Inventors: JENN-YEU NIEH (SAINT JOSEPH, MI), MATTHEW CRAIG PARSONS (DOWAGIAC, MI), JON D. STRAIT (SAINT JOSEPH, MI), NYIK SIONG WONG (SAINT JOSEPH, MI)
Application Number: 12/209,398
International Classification: D06F 39/02 (20060101);